Pick a shape.Make it your story’s.

What a story structure is for

Every structure is an observation about where stories tend to turn. Readers feel the rhythm even if they have never heard the names: a change about a quarter of the way in, a reversal in the middle, a low point before the end. A structure template is useful when you are planning, because it tells you roughly where those turns should land, and when you are revising, because a sagging middle usually means a missing turn.

None of them is a rule. Many good books fit two structures at once, and some fit none. The best way to use a template is as a set of questions (what is my midpoint? what is my lowest moment?) rather than a set of boxes to fill.

It also helps to know that structures mostly describe the same few movements in different words. A catalyst, a call to adventure and a first plot turn are close cousins. Choosing between them matters less than choosing one, so the turns of your story have somewhere to stand while you write.

The classic shapes

Three acts is the plainest: setup, confrontation, resolution, with the long middle split at a midpoint reversal. Act one ends when the hero commits and can’t go back; the second half of the middle is where things fall apart, down to an all-is-lost moment; act three is the new resolve, the climax and the cost. It suits almost anything, and thrillers in particular.

The hero’s journey, drawn from the study of myth, follows departure, initiation and return: an ordinary world, a call, a refusal, a mentor, a threshold, trials, an ordeal, a reward with a price, and a return home changed. It suits fantasy, adventure and coming-of-age stories. The 15-beat sheet is a screenwriting map adapted for novels: an opening image, a theme stated, a catalyst, a debate, a break into the new world, a B story that carries the theme, the promise of the premise delivered, and the closing image that mirrors the first.

• Three acts: any story, film-like pacing
• The hero’s journey: fantasy, adventure, coming of age
• 15-beat sheet: commercial fiction of any genre

Shapes for character, tight plots and quiet books

The story circle is eight steps around a loop: a character in their comfort zone, a want, an unfamiliar situation, a struggle, getting what they wanted, paying for it, returning, changed. It is compact, so it suits character-driven stories, episodes and each book of a series. Seven-point structure is planned backwards: decide the ending, make the hook its opposite, then place two plot turns, two pinches and a midpoint where the hero stops reacting and starts acting. It suits horror, mysteries and tight plots.

Kishōtenketsu, from Chinese and Japanese storytelling, has four parts and no central conflict: introduce the people and the place, develop them, bring in a turn that seems unrelated, then reconcile it into a new whole. It suits literary fiction, slice of life and quiet books, and it is a useful corrective if every plan you make turns into a fight.

Shapes built for a genre

Romance has its own spine, because the relationship is the plot. Authrot’s romance shape runs in four phases: two incomplete lives and a meeting that sparks or grates; falling in love, up to a midpoint of intimacy; a retreat, as the old wound returns and they lose each other; and fighting for it, through a grand gesture to the ending readers require.

The mystery shape runs in four movements: the crime and why this sleuth takes the case; the investigation, with suspects and a first theory that a second crime breaks; the twist, where an early clue seen anew points somewhere else; and the reveal, fairly proven. For web serials and long progression stories there is also a serial shape: a run of arcs, each its own story with a goal, a setback, a midpoint, a low point, a climax and a breather that hooks the next.

Using structure to fix a sagging middle

The middle of a novel is where most drafts lose their way. The opening has the energy of a new idea and the ending has the pull of the climax, but the thirty chapters between can turn into one complication after another with no change in direction. Almost every structure has the same answer: a midpoint. A false victory, a false defeat, a reveal, or the moment the hero stops reacting and starts acting. Whatever it is, the story after it is about something different from the story before.

If your middle sags, lay a structure beside your chapters and look for the turns it expects. A missing midpoint, a pinch where the opposition never shows its strength, or a low point that isn’t low enough are all easier to see against a template than against a blank page. The template doesn’t write the fix, but it tells you which kind of scene is missing and roughly where it should go.

From template to your arcs

On the Arcs page, while the list is empty, Lay out from a structure shows every shape with what it suits. Pick one, say about how many chapters your book will run, and you see the plan before anything is made: each arc with its length and its beats, each beat placed at a chapter. Lay it out and the arcs are yours. Titles, lengths and turning points can all be changed on each arc.

What a template can’t know is your story, so each arc’s goal, opposition, stakes and outcome stay open. Write them yourself, or have the Co-writer draft them from your Foundations. The structures are plain data with no model behind them, so laying one out works with the AI off.